Comment on ``Understanding the scalar meson quark-antiquark nonet''

Details Comment on ``Understanding the scalar meson quark-antiquark nonet'' Comment on ``Understanding the scalar meson quark-antiquark nonet''

1998-06-03

arxiv.org/abs/hep-ph/9806246v4

Eur.Phys.J.C10:469-472,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, plain LaTeX, extension (more detailed on pole doubling and f0(1500) interpretation) and cosmetics

Scientific paper

10.1007/s100520050769

It is shown that the incomplete scalar meson nonets found by Toernqvist (T) and Toernqvist and Roos (TR), employing a new version of the Helsinki unitarised quark model, should in fact be complete, including an as yet unconfirmed light K*0 below 1 GeV (old kappa) and the established f0(1500). A detailed comparison is presented with the predictions of the Nijmegen unitarised meson model, in which two complete scalar nonets show up below 1.5 GeV. The reason for the flavour-nonet breaking found in T and TR we argue to originate in the use of coupling constants for the three-meson vertex which are not independent of flavour. Also some statements made by Toernqvist are critically reviewed.

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